Peel the rhubarb stalks and cut them into small square pieces. Then weigh them, and to each pound allow three quarters of a pound of powdered loaf-sugar. Put the sugar and the rhubarb into a large, deep, white pan, in alternate layers, the top layer to be of sugar - cover it, and let it stand all night. In the morning, put it into a preserving kettle, and boil it slowly till the whole is dissolved into a thick mass, stirring it frequently, and skimming it before every stirring. Put it warm into glass jars, and tie it up with brandy paper.